Winding of revolving magnets.



'No. 729,655. PATBNTED JUNE 2, 1903.

0. A. PARSONS. WINDING OF REVOLVING MAGNETS.

APPLICATION FILED OUT. 7, 1902.

NO MODEL. 11 SHEETS-SHEET 1.

No. 729,655. PATENTED' JUNE 2, 1903.

S c. A. PARSONS. WINDING OF REVOLVING MAGNETS.

APPLIOATION FILED 00127, 1902.

N0 MODEL. 11 SHEETS-SHEET 2.

No. 729,655. PATENTED JUNEAZ, 1903. c. A. PARSONS. WINDING OF REVOLVINGMAGNETS.

APPLICATION FILED OCT. '7, 1902.

11 SHEETSSHEET 3.

N0 MODEL.

PATBNTED JUNE 2, 1903 C. A. PARSONS. WINDING 0P REVOLVING MAGNETS.

APPLICATION FILED OUT. 7, 1902.

11 SHEETSSHEET 4.

NO MODEL.

No. 729,655. I PATENTED JUNE 2, 1903.

' c. A. PARSONS.

WINDING 0F REVOLVING MAGNETS.

APPLICATION rum) 0017, 1902.

N0 MODEL. 11 SHBETSSHEET 5.

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@ZZGSZ 73025 PATENTED JUNE 2, 1903. o. A. PARSONS. WINDING 0F REVOLVINGMAGNETS.

APPLICATION FILED OUT. 7, 1902.

11 SHEETS-SHEET 1w MODEL.

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No. 729,655. PATENTED JUNE 2, 190-3. 0. A. PARSONS.

WINDING OF REVOLVING MAGNETS.

APPLICATION FILED 001'. 7. 1902.

no MODEL. 11 SHEETS-SHEET 7 W @QTW @7190703 War I 3 D45 unNRIS Perms no,PHOTO-Ll'fwl. whsmumm u c No. 729,655. PATENTED JUNE 2, 1903.

I V G. A. PARSONS.

WINDING OF REVOLVING MAGNETS.

APPLICATION FILED OUT. 7, 1902.

N0 MODEL. I 11 SHEETS-SHEET 8L wrzz zmvm TML "cams PETER; so,PNOTO-LITMD,WASHINGTON, u. c.

PATENTED JUNE 2, 1903.

C. A. PARSONS.

WINDING OP REVOLVING MAGNETS.

APPLICATION FILED OUT. 7, 1902.

11 SHEETSSHEET 9.

NO MODEL.

@rcram? val/44m No. 729,655. PATENTED JUNE 2, 1903. G. A. PARSONS.

WINDING OF REVOLVING MAGNETS.

APPLICATION I'LLED OCT. 7, 1902.

'11 SHEETSSHEET 10.

N0 MODEL.

$7 I 3y m AM M Tu: woman PETERs c0. PHOTO-LIYHO. vnswmmou. 0 4;

PATENTBD JUNE 2 O. A. PARSONS.

WINDING O F REVOLVING MAGNETS APPLICATION FILED OCT. 7, 1902.

11 SHEETS-SHEET 11.

N0 MODEL.

x x s 1 I I I /ar 7271M No.729,655. V Patented June 2,1903. UNITEDSTATES PATENT OFFICE.

CHARLES ALGERNON masons, or NEWOASTLE-U'PON-TYNE, ENGLAND. wm DING o'FRsvo v Ne; MAGNETS.

SPECIFICATION forming part-of Letters Patent N 0. 729,655, dated J'une2, 1903. Application filed October '7, 1902. Serial No. 126,355. Nomodel.)

To all whom it may concern: nal section of the end of field-magnet shownBe it known that 1, CHARLES ALGERNON in Fig. 7 on the line D F. Fig. 10is afront PARSONS, a subject of the King of Great Britview ofone-of thequadrant-shaped slabs carain and Ireland, residing at Heaton \Vorks,rying the end. windings. Fig. 10 is a section -5 5Newcastle-upon-Tyne,intheconnty ofNorthof Fig. on the line B S. Fig. 10is a deumberland, England, have invented certain veloped top view of agroup of slabs as in new and useful Improvements in the Vind- Fig. 10.Fig. 10 is a section of an arrange ing of RevolvingMagnets, (for which Ihave ment somewhat different from that shown in made application forLetters Patent in Great Fig. 8. Fig. 10 is a part of an end view of 0 I0Britain, No. 5,907, bearing date March 10, Fig. 10 withback partofcapremoved. Fig. 1902,) of which the followingisaspecification. 11. isan end view of a two poled field-magnet My invention relates to theconstruction with the end cap removed from one half. and winding ofrevolvingmagnets, and more Fig. 12 is a longitudinal section of Fig. 11,especially to those that revolve at high angupartly on line G K andpartly on line G 1-1. I 5 larvelocitiesandare driven by steam-turbinesFig. 13 is the end view of another form of twoor other high-speedmotors, such as Pelton poled revolving field-magnet, the end capbewheels, water turbines, or electric-motors. ing half .removed. Fig. 14is a longitudinal In such cases the centrifugal force is so greatsection of Fig. 13, partly on line L M and that the ordinaryconstruction of magnet-coils partly on line L N. 7 O '20 wound on thepoles of revolving magnets is In carrying my invention into effectacdifficult or impracticable. cording, to the form illustrated in Figs.1 to U My invention consists in constructing a re- I construct therevolving magnets of thin volving field-magnet adapted with itswindplates of iron or other suitable material strung ings to withstandcentrifugal forces of great on a shaft 0.. These plates may be star- 25magnitude; also by its construction tosecure shaped or of any otherconvenient shape, a great amount of subdivision of the magnet- .with orwithout extended pole-pieces. In the windings and a large amount ofsurface of the form illustrated in Figs. 1 to (5 the magnet isconductorexposed for air-cooling, so asto permade up of two sets ofplates 1) and 0, armit of veryhigh current densities in the mag-j rangedalternately and shaped as shown in 8o 30 net-coils and a much greateroutput from the Figs. 1 and 2. To the plates 0 are riveted or dynamo inproportion to its size, weight, and otherwise secured plates (Z, (shownseparately cost of material than has hitherto been pos v in Fig. 3,) ofbrass, delta metal, or other nonsible. magnetic material. These platescl are perhe accompanyingdrawings illustrate some forated by a number ofholes 6 e of suitable 3 5 froms in which my invention may be carriedshape to carry the windingsaround the poles. into effect. They may alsobe perforated with holes f for Figures 1 and 2 show the shape of theplates ventilation purposes. If the magnet be arused in a laminatedfield-magnet with four ranged with four poles, as in the example poles.Fig. 3 is a plate forcarrying the wind illustrated, then four sets ofthese plates dare 9o ings between the poles of themagnet. Fig. necessaryand are so disposed as to bridge a is a section through a builtfield-magnet. over the gap between each pair of poles of Fig. 5 is alongitudinal section on line A 13, the magnet. The plates (Z may bedisposed Fig. 1. Fig. 6 is a longitudinal section online one on eachside of the plates 0, as shown in A C, Fig. a. Fig. '7 is a sectionthrough a Fig. (i, or on one side only. a The spaces left 5 field-magnetmade with a solidcore. Fig. 8 between the plates when these compound isaview of the end of the field-magnet shown plates are strung on theshaft may beleft in Fig. 7, partly in outside elevation and vacant ormaybe filled with suitably-shaped partly in section on line D E, Fig. 7.Fig. 9 plates of iron or other material, magnetic or is an elevation ofpart of the body of field-- non-magnetic, secured or not to the former5o magnet shown in Fig. 7 with part of the outplates. The perforations ein the the plates d side sheath removed. Fig. 10 is a longitudimay bebushed or flanged, as shown at g, Fig.

4, so as to reduce the local pressure on the winding and its insulationdue to the great centrifugal force.

Instead of having the magnet laminated I sometimes construct it of asingle steel casting or soft-iron forging, as shown in the form of myinvention illustrated in Figs. 7 to 10. In this case the perforatedplates (Z are made with T-headed tongues h attached to them, which fitinto similar] -shaped grooves milled or otherwise formed in the body 7of the mag net between the poles and preferably running parallel to theshaft. The edges of the perforated plates may be engaged with. the sidefaces of the pole-pieces in any suitable manner, as shown at 10, Fig. 7.The pole-faces may be left solid; but I prefer to machine grooves 70,Fig. 8, in them or to fix to them by dovetails, screws, or othersuitable means laminated iron shoe-pieces to prevent eddyeurrents in thepolar faces. Where the wind ings of the magnets leave the plates at theends, they are retained in their respective places by plates or slabs Z,of aluminium, brass, or other suitable material, one of which is shownin Figs. 10 and 10 and 3 in Figs. 10 and 10. These slabs may be furrowedon one or both faces, the furrow t on the back forming air passages,while the curved grooves 01 on the face carry the windings. Holes u maybe made in these slabs to permit a current of air to circulate aroundeach conductor or group of conductors. Other slabs y, of cylindrical ordrum form suitably drilled and furrowed, as shown in Figs. 10 and 10,may be used instead of the slabs Z, so constructed that the whole endforms a wind-cage and provides the maximum possible amount of coolingover the end windings. These slabs are held in position by massive capsm, of steel, manganese bronze, or other suitable material, or in somecases by binding-wire. The caps are preferably perforated to allow ofventilation.

Figs. 11 to 14: show my invention as ap plied to a two-poled magnet. Inthis case only two sets of the perforated plates (l are necessary, andthese may be secured by the T-headed tongue h, held in the groove milledin the magnet, and the projections n and 0, bearing against the sides ofthe pole-pieces, as illustrated in Fig. 11, or, as is sometimespreferable in bipolar magnets, they may be held by means of dovetails orother suitable arrangement in transverse slots cut in the body of themagnet and prevented from sliding endwise by two strips 19 and q, ofiron or other suitable material, fixed to the body of the magnet, asillustrated, in Fig. 13.

If it is desired to reduce the noise While running, a shield formed of atube 8, Figs.

l, 7, 8, and 10, of suitable material, may be placed over the wholemagnet in any of the above-described forms. This tube may be perforated(as shown at 1-, 8) or not for ventilation, as desired.

It is obvious that this invention may be applied to field-magnets havingany number of poles.

Having now I claim as new, Patent, is

1. In dynamo electric machines having revolving field-magnets,bridge-pieces of nonmagnetic material fitted between the poles of themagnet to carry the windings, said bridge pieces being perforated withholes suitable for the winding to pass through and having furtherperforations for the purpose of ventilation.

2. In dynamo electric machines having revolving field-magnets,perforated bridgepieces of non-magnetic material fitted between thepoles of the magnet to carry the windings, grooved slabs of non-magneticmaterial to carry the end windings and means for retaining said slabs inposition.

3. In dynamo electric machines having revolving field-magnets,perforated bridgepieces of non-magnetic material fitted between thepoles of the magnet to carry the windings, grooved slabs of non-magneticmaterial to carry the end windings and strong caps fitted onto the endsof the field-magnets to'keep said grooved slabs and end windings inposition.

4,. In a dynamo-electric machine the combination with a revolving fieldmagnet of perforated non-magnetic bridge-pieces carrying the windingsbetween the pole-pieces, non-magnetic grooved slabs carrying the endwindings, caps fitted on the ends of the field magnets to keep saidgrooved slabs and end windings in position and a thin tubular sheathcovering the body of the field-magnet.

5. In a dynamo-electric machine the combination with a revolving fieldmagnet of perforated non-magnetic bridge-pieces earrying the windingsbetween the pole-pieces, non-magnetic grooved slabs carrying the endwindings, caps fitted 011 the ends of the fieldmagnets to keep saidgrooved slabs and end windings in position and a thin tubular sheathcovering the body of the field-magnet said end cap and sheath beingperforated with holes to allow of ventilation.

In witness whereof I have hereunto hand in presence of two witnesses.

CHARLES ALGERNON PARSONS.

described my invention, what and desire to secure by Letters set my\Vitnesses:

HENRY GRAHAM DAKYNS, J1-., WILLIAM DAGGETT.

